### Example HTTP GET Query

Source: https://docs.opensips.org/manual/3-6/modules/db_http

Demonstrates the format of a GET request sent to the database server.

```http
GET /presentity/?c=username,domain,event,expires HTTP/1.1
```

--------------------------------

### Install OpenSIPS

Source: https://docs.opensips.org/manual/3-6/install-compileandinstall

Install the compiled binaries and files to the configured prefix.

```bash
make install
```

--------------------------------

### Sample HttpServlet Implementation

Source: https://docs.opensips.org/manual/3-6/modules/seas

A standard Java HttpServlet example demonstrating how to handle HTTP GET requests and output HTML content based on request headers.

```Java

public final class Hello extends HttpServlet {
protected void doGet(HttpServletRequest request,HttpServletResponse response)
      throws IOException, ServletException
    {
response.setContentType("text/html");
PrintWriter writer = response.getWriter();
writer.println("<html>");
writer.println("<head>");
writer.println("<title>Sample Application Servlet</title>");
writer.println("</head>");
writer.println("<body bgcolor=white>");
writer.println("<table border=\"0\" width=\"100%\">");
Enumeration names = request.getHeaderNames();
while (names.hasMoreElements()) {
    String name = (String) names.nextElement();
    writer.println("<tr>");
    writer.println("<th align=\"right\">"+name+":</th>");
    writer.println("<td>"+request.getHeader(name)+"</td>");
    writer.println("</tr>");
}
writer.println("</table>");
writer.println("</body>");
writer.println("</html>");
    }
}

```

--------------------------------

### Call example() function

Source: https://docs.opensips.org/manual/3-6/modules/example

Executes the example function to print a log message. Can be used from any route.

```OpenSIPS Script

...
example();
...
```

--------------------------------

### Complete script example

Source: https://docs.opensips.org/manual/3-6/modules/uac_redirect

A full configuration example demonstrating module loading and usage of get_redirects within a failure route.

```OpenSIPS Script
loadmodule "modules/sl/sl.so" 
loadmodule "modules/usrloc/usrloc.so" 
loadmodule "modules/registrar/registrar.so" 
loadmodule "modules/tm/tm.so" 
loadmodule "modules/acc/acc.so" 
loadmodule "modules/uac_redirect/uac_redirect.so" 


modparam("usrloc", "db_mode",   0) 


route{ 
  if (is_myself("$rd")) { 


    if ($rm=="REGISTER") { 
      save("location"); 
      exit; 
    }; 


    if (!lookup("location")) { 
      sl_send_reply(404, "Not Found"); 
      exit; 
    }; 
  } 


  t_on_failure("do_redirect"); 


  if (!t_relay()) { 
    sl_reply_error(); 
  }; 
} 


failure_route[do_redirect] { 
  if (get_redirects(3, 1)) 
    t_relay(); 
}
```

--------------------------------

### HTTP Database Query Examples

Source: https://docs.opensips.org/manual/3-6/modules/db_http

Examples of GET and POST requests for database operations using URL parameters.

```HTTP
GET /presentity/?c=username,domain,event,expires HTTP/1.1
GET /version/?k=table_name&v=xcap&c=table_version HTTP/1.1
```

```HTTP
POST /active_watchers HTTP/1.1


k=id&v=100&query_type=insert
```

--------------------------------

### Route to Carrier Examples

Source: https://docs.opensips.org/manual/3-6/modules/drouting

Examples of using route_to_carrier with and without partitions enabled.

```opensips
# use_partitions is not set
if ( route_to_carrier("my_top_carrier, def_carrier", , $var(carrier_att)) ) {
  xlog("Routing to \"my_top_carrier\" - $var(carrier_att)\n");
  t_on_failure("next_gw");
  t_relay();
  exit;
}
```

```opensips
# use_partitions is enabled
if ( route_to_carrier("my_top_carrier", , $var(carrier_att), "part") ) {
  xlog("Routing to \"my_top_carrier\" - $var(carrier_att)\n");
  t_on_failure("next_gw");
  t_relay();
  exit;
}
```

```opensips
# use_partitions is enabled
if ( route_to_carrier($var(carrierId), , , $var(my_partition)) ) {
  xlog("Routing to \"my_top_carrier\"\n");
  t_on_failure("next_gw");
  t_relay();
  exit;
}
```

--------------------------------

### Deploy LocalStack for SQS Testing

Source: https://docs.opensips.org/manual/3-6/modules/event_sqs

Commands to install and start LocalStack for local SQS development.

```bash
pip install localstack
localstack start
```

--------------------------------

### Install libmemcached

Source: https://docs.opensips.org/manual/3-6/modules/cachedb_memcached

Commands to download, compile, and install the required libmemcached library.

```bash
$ wget http://download.tangent.org/libmemcached-0.31.tar.gz
$ tar -xzvf libmemcached-0.31.tar.gz
$ cd libmemcached-0.31
$ ./configure
$ make
$ sudo make install
```

--------------------------------

### Install ldserverapi library

Source: https://docs.opensips.org/manual/3-6/modules/launch_darkly

Instructions for cloning and installing the required ldserverapi library as a shared library.

```bash
$ git clone https://github.com/launchdarkly/c-server-sdk.git
$ cd c-server-sdk
$ cmake -DBUILD_SHARED_LIBS=On -DBUILD_TESTING=OFF .
$ sudo make install
```

--------------------------------

### Start MySQL server

Source: https://docs.opensips.org/manual/3-6/modules/db_unixodbc

Command to start the MySQL server with a specific socket path.

```shell
shell>safe_mysqld --user=mysql --socket=/var/lib/mysql/mysql.sock
```

--------------------------------

### Additional Credentials Syntax Examples

Source: https://docs.opensips.org/manual/3-6/modules/auth_aaa

Examples of how additional credentials are formatted as strings to be stored as OpenSIPS AVPs.

```text
....
"email:joe@yahoo.com"
    - STRING NAME AVP (email) with STRING VALUE (joe@yahoo.com)
"#14:joe@yahoo.com"
    - ID AVP (14) with STRING VALUE (joe@yahoo.com)
"age#28"
    - STRING NAME AVP (age) with INTEGER VALUE (28)
"#14#28"
    - ID AVP (14) with INTEGER VALUE (28)
....
```

--------------------------------

### Measure duration in script

Source: https://docs.opensips.org/manual/3-6/modules/benchmark

Example of wrapping a function call with timer start and log commands.

```opensips
...
bm_start_timer("usrloc-lookup");
lookup("location");
bm_log_timer("usrloc-lookup");
...
```

--------------------------------

### Configure Installation Prefix

Source: https://docs.opensips.org/manual/3-6/install-compileandinstall

Set the root directory for the OpenSIPS installation.

```makefile
PREFIX ?= /opt/opensips/
```

--------------------------------

### Infrastructure ENUM TXT record example

Source: https://docs.opensips.org/manual/3-6/modules/enum

Example DNS records for the 'txt' branching algorithm.

```dns
i.1.e164.arpa.                     IN TXT   "4"
9.9.9.8.7.6.5.i.4.3.2.1.e164.arpa. IN NAPTR "NAPTR content for  +1 234 5678 999"
```

--------------------------------

### Configure authentication modules

Source: https://docs.opensips.org/manual/3-6/modules/db_unixodbc

Example configuration for auth and auth_db modules to work with the database.

```opensips
....
loadmodule "/usr/local/lib/opensips/modules/auth.so"
loadmodule "/usr/local/lib/opensips/modules/auth_db.so"
modparam("usrloc", "db_mode", 2)
modparam("auth_db", "calculate_ha1", yes)
modparam("auth_db", "password_column", "password")
....
```

--------------------------------

### Retrieve startup arguments

Source: https://docs.opensips.org/manual/3-6/interface-coremi

Returns the full list of arguments used to start the OpenSIPS binary.

```bash
$ opensips-cli -x mi arg
[
    "./opensips",
    "-f",
    "/etc/openser/test.cfg"
]
```

--------------------------------

### rtpengine_start_forwarding([flags[, sockvar]])

Source: https://docs.opensips.org/manual/3-6/modules/rtpengine

Starts forwarding media to a TLS destination.

```APIDOC
## rtpengine_start_forwarding

### Description
Starts forwarding the media to a TLS destination specified in the tls-send-to parameter of RTPEngine. You can select the media stream to forward by specifying the from-tag.

### Parameters
- **flags** (string) - Optional - A list of flags.
- **sockvar** (var) - Optional - Socket variable.
```

--------------------------------

### SNMP Table Output Example

Source: https://docs.opensips.org/manual/3-6/modules/snmpstats

Example output format returned by the snmptable command.

```text
    index openserSIPUserUri openserSIPUserAuthenticationFailures
        1       DefaultUser                                    0
        2            bogdan                                    0
        3    jeffrey.magder                                    0
```

--------------------------------

### example()

Source: https://docs.opensips.org/manual/3-6/modules/example

Prints a message to the log indicating that the function has been called. This function can be used from any route.

```APIDOC
## example()

### Description
Prints a message to the log indicating that the function has been called. This function can be used from any route.

### Usage
```
example();
```
```

--------------------------------

### Kafka socket syntax example

Source: https://docs.opensips.org/manual/3-6/modules/event_kafka

Example of a Kafka socket string including broker address, topic, and configuration properties.

```OpenSIPS Script
kafka:127.0.0.1:9092/topic1?t.message.timeout.ms=1000&key=callid
```

--------------------------------

### IMC Command Examples

Source: https://docs.opensips.org/manual/3-6/modules/imc

Examples of various IMC commands used for managing conference rooms and memberships.

```text
#create chat-000 private
```

```text
join sip:chat-000@opensips.org
```

```text
#join
```

```text
#invite sip:john@opensips.org sip:chat-000@opensips.org
```

```text
#invite john@opensips.org
```

```text
#accept sip:john@opensips.org
```

```text
#remove sip:john@opensips.org
```

--------------------------------

### Alternative Regex Grouping Example

Source: https://docs.opensips.org/manual/3-6/modules/regex

A secondary example showing how different input groups are mapped to compiled regex output.

```text

[1]
^aaa
^bbb


[2]
^ccc
^ddd

```

```text

group 0: ((^aaa)|(^bbb))
group 1: ((^ccc)|(^ddd))

```

--------------------------------

### Configure b2b_init_request flags

Source: https://docs.opensips.org/manual/3-6/modules/b2b_logic_xml

Example of flag definitions for the b2b_init_request function.

```text
*t[nn]* -  Call setup timeout for topology hiding scenario.
        Example: t300.
        *a* -  Transparent authentication. In this mode b2b passes your 401
        or 407 authentication request to destination server.
        *p* -  Preserve To: header.
```

--------------------------------

### Configure launch_darkly module parameters

Source: https://docs.opensips.org/manual/3-6/modules/launch_darkly

Configuration examples for the mandatory SDK key and optional module parameters.

```opensips
modparam("launch_darkly", "sdk_key", "sdk-12345678-abcd-12ab-1234-0123456789abc")
```

```opensips
modparam("launch_darkly", "ld_log_level", "LD_LOG_CRITICAL")
```

```opensips
modparam("launch_darkly", "connect_wait", 100)
```

```opensips
modparam("launch_darkly", "re_init_interval", 30)
```

--------------------------------

### Carrierroute Routing Table Example

Source: https://docs.opensips.org/manual/3-6/modules/carrierroute

Example of a routing table configuration for the carrierroute module, demonstrating prefix-based routing and carrier selection.

```SQL
+----+---------+--------+-------------+-------+------+---------------+
| id | carrier | domain | scan_prefix | flags | prob | rewrite_host  |
+----+---------+--------+-------------+-------+------+---------------+
| 1  |       1 |      0 | 49          |     0 |  0.5 | de-1.carrier1 |
| 2  |       1 |      0 | 49          |     0 |  0.5 | de-2.carrier1 |
| 3  |       1 |      0 | 49          |    16 |    1 | de-3.carrier1 |
| 4  |       1 |      0 |             |     0 |    1 | gw.carrier1-1 |
| 5  |       1 |      1 | 49          |     0 |    1 | gw.carrier1-1 |
| 6  |       1 |      2 |             |     0 |    1 | gw.carrier1-2 |
| 7  |       1 |      3 |             |     0 |    1 | gw.carrier1-3 |
| 8  |       2 |      0 | 49          |     0 |  0.5 | de-1.carrier2 |
| 9  |       2 |      0 | 49          |     0 |  0.5 | de-2.carrier2 |
| 10 |       2 |      0 |             |     0 |    1 | gw.carrier2   |
| 11 |       2 |      1 | 49          |     0 |    1 | gw.carrier2   |
| 12 |       3 |  start | 49          |     0 |    1 | de-gw.default |
| 13 |       3 |  start |             |     0 |    1 | gw.default    |
+----+---------+--------+-------------+-------+------+---------------+
```

--------------------------------

### ua_session_client_start

Source: https://docs.opensips.org/manual/3-6/modules/b2b_entities

Starts a new UAC session by sending an initial INVITE.

```APIDOC
## ua_session_client_start

### Description
Starts a new UAC session by sending an initial INVITE. Further requests/replies will be handled via the E UA SESSION event.

### Parameters
- **ruri** (string) - Required - Request URI
- **to** (string) - Required - To URI; can include display name (e.g., display_name,uri)
- **from** (string) - Required - From URI; can include display name (e.g., display_name,uri)
- **proxy** (string) - Optional - URI of the outbound proxy
- **body** (string) - Optional - Message body
- **content_type** (string) - Optional - Content Type header
- **extra_headers** (string) - Optional - Extra headers
- **flags** (string) - Optional - Session flags
- **socket** (string) - Optional - OpenSIPS sending socket

### Command
`opensips-cli -x mi ua_session_client_start ruri=sip:bob@opensips.org to=sip:bob@opensips.org from=sip:alice@opensips.org flags=arhb`
```

--------------------------------

### rtpengine_start_recording([flags [, sock_var]])

Source: https://docs.opensips.org/manual/3-6/modules/rtpengine

Sends a signal to the RTP proxy to start recording the RTP stream.

```APIDOC
## rtpengine_start_recording([flags [, sock_var]])

### Description
This function sends a signal to the RTP proxy to record the RTP stream.

### Parameters
- **flags** (string, optional) - Flags to change recorder behavior (e.g., call-id).
- **sock_var** (var, optional) - Variable to store the rtpengine socket.
```

--------------------------------

### Start Media Forwarding

Source: https://docs.opensips.org/manual/3-6/modules/rtpengine

Initiates media forwarding to a TLS destination.

```OpenSIPS Script
...
rtpengine_start_forwarding();
...
```

--------------------------------

### Handle feature status in script routes

Source: https://docs.opensips.org/manual/3-6/modules/presence_dfks

Example implementation of set and get routes using $dfks pseudo-variables to manage feature status and values.

```OpenSIPS Script

...
route[dfks_set] {
    # CallForwardingAlways is not allowed
    if ($dfks(feature) == "CallForwardingAlways")
        $dfks(status) = 0;


    xlog("New status: $dfks(status) for feature '$dfks(feature)' of user '$dfks(presentity)'\n");
}
route[dfks_get] {
    if ($dfks(feature) == "CallForwardingNoAnswer") {
        $dfks(status) = 1;
        $dfks(value/forwardTo) = "sip:bob@10.0.0.11";
        $dfks(value/ringCount) = "3";
    } else if ($dfks(feature) == "CallForwardingAlways")
        $dfks(assigned) = 0;
    } else {
        ...
    }
}
...

```

--------------------------------

### Basic Preprocessor Usage

Source: https://docs.opensips.org/manual/3-6/templating-config-files

Demonstrates the -p option for piping configuration files through standard command-line tools.

```bash
opensips -f opensips.cfg -p /bin/cat
```

```bash
opensips -f opensips.cfg -p "/bin/sed s/PRIVATE_IP/10.0.0.10/g"
```

--------------------------------

### Start RTP Stream Recording

Source: https://docs.opensips.org/manual/3-6/modules/rtpproxy

Examples of initiating RTP stream recording, including options for remote UDP destinations and specific media stream selection.

```OpenSIPS Script
... 
rtpproxy_start_recording();


# copy RTP stream to a different listener
rtpproxy_start_recording(,,,"udp:127.0.0.1:60000");


# copy only first RTP stream (audio stream)
rtpproxy_start_recording(,,,"udp:127.0.0.1:60000", 1);
...
```

--------------------------------

### Load and Configure Modules

Source: https://docs.opensips.org/manual/3-6/script-syntax

Demonstrates loading modules using loadmodule and setting parameters with modparam.

```text
loadmodule "modules/mi_datagram/mi_datagram.so"
modparam("mi_datagram", "socket_name", "udp:127.0.0.1:4343")
modparam("mi_datagram", "children_count", 3)
```

```text
mpath="/usr/local/opensips_proxy/lib/modules"
loadmodule "mi_datagram.so"
modparam("mi_datagram", "socket_name", "udp:127.0.0.1:4343")
modparam("mi_datagram", "children_count", 3)
loadmodule "mi_fifo.so"
modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
```

--------------------------------

### Regex Configuration File Format

Source: https://docs.opensips.org/manual/3-6/modules/regex

Example of the required file format for grouping regular expressions. Lines starting with symbols like # are ignored, and each expression must occupy a single line.

```text

### List of User-Agents publishing presence status
[0]


# Softphones
^Twinkle/1
^X-Lite
^eyeBeam
^Bria
^SIP Communicator
^Linphone


# Deskphones
^Snom


# Others
^SIPp
^PJSUA




### Blacklisted source IP's
[1]


^190\.232\.250\.226$
^122\.5\.27\.125$
^86\.92\.112\.




### Free PSTN destinations in Spain
[2]


^1\d{3}$
^((\+|00)34)?900\d{6}$

```

--------------------------------

### launch() syntax variants

Source: https://docs.opensips.org/manual/3-6/script-async

Demonstrates the different ways to invoke the launch() statement, including optional report routes and parameter passing.

```opensips
launch(blocking_function(...));
or
launch(blocking_function(...), report_route);
route[report_route] {}
or
launch(blocking_function(...), report_route, "Something with $var(xx) to be passed to report route");
route[report_route] {
   xlog("received as input the <$param(1)> string\n");
}
```

--------------------------------

### Example of do_routing usage

Source: https://docs.opensips.org/manual/3-6/modules/drouting

Basic usage snippet for the do_routing function.

```OpenSIPS Script

...
# all groups, sort on order,

```

--------------------------------

### Start UAC Session

Source: https://docs.opensips.org/manual/3-6/modules/b2b_entities

Initiates a new UAC session by sending an INVITE request.

```bash

opensips-cli -x mi ua_session_client_start ruri=sip:bob@opensips.org \
to=sip:bob@opensips.org from=sip:alice@opensips.org flags=arhb

```

--------------------------------

### Initialize Makefile.conf

Source: https://docs.opensips.org/manual/3-6/install-compileandinstall

Create the configuration file from the template before editing build settings.

```bash
cp Makefile.conf.template Makefile.conf
```

--------------------------------

### Call example_str() function

Source: https://docs.opensips.org/manual/3-6/modules/example

Logs a provided string or the default_str parameter if no argument is passed.

```OpenSIPS Script

...
example_str("test");
...
```

--------------------------------

### Configure onreply_route blocks in OpenSIPS

Source: https://docs.opensips.org/manual/3-6/script-routes

Example demonstrating the configuration of global, branch-specific, and transaction-specific reply routes.

```opensips
route {
        $ru = "sip:bob@opensips.org";  # first branch
        $msg.branch = "sip:alice@opensips.org"; # second branch


        t_on_reply("global"); # the "global" reply route
                              # is set the whole transaction
        t_on_branch("1");


        t_relay();
}


branch_route[1] {
        if ($rU=="alice")
                t_on_reply("alice"); # the "alice" reply route
                                      # is set only for second branch
}


onreply_route {
        xlog("OpenSIPS received a reply from $si\n");
}


onreply_route[alice] {
        xlog("received reply on the branch from alice\n");
}


onreply_route[global] {
        if (t_check_status("1[0-9][0-9]")) {
                setflag("PROVISIONAL_REPLY");
                log("provisional reply received\n");
                if (t_check_status("183"))
                        drop;
        }
}
```

--------------------------------

### Default Configuration File Path

Source: https://docs.opensips.org/manual/3-6/configure-file

The standard location for the OpenSIPS configuration file after installation.

```text
[INSTALL_PATH]/etc/opensips/opensips.cfg
```

--------------------------------

### Authorize a call with cgrates_cmd

Source: https://docs.opensips.org/manual/3-6/modules/cgrates

Example of setting session parameters and executing an authorization command.

```OpenSIPS Script
... 
# cgrates_auth($fU, $rU); simulation
$cgr_opt(Tenant) = $fd;
$cgr(Account) = $fU;
$cgr(OriginID) = $ci;
$cgr(SetupTime) = "" + $Ts;
$cgr(RequestType) = "*prepaid";
$cgr(Destination) = $rU;
cgrates_cmd("SessionSv1.AuthorizeEvent");
xlog("Call is allowed to run $cgr_ret seconds\n");
...
```

--------------------------------

### AVP Copy Examples

Source: https://docs.opensips.org/manual/3-6/modules/avpops

Examples of copying or moving AVPs using avp_copy.

```opensips
...
avp_copy("$avp(foo)", "$avp(bar)/g");
avp_copy("$avp(old)", "$avp(new)/gd"); # also deletes $avp(old)
...
```

--------------------------------

### OpenSIPS Dispatcher Configuration Script

Source: https://docs.opensips.org/manual/3-6/modules/dispatcher

A sample configuration file demonstrating module loading, database parameter setup, and basic request routing using the dispatcher module.

```opensips
#
# sample config file for dispatcher module
#


socket= udp:*:5060


udp_workers = 2
check_via = off     # (cmd. line: -v)
dns = off           # (cmd. line: -r)
rev_dns = off       # (cmd. line: -R)


# for more info: opensips -h


# ------------------ module loading ----------------------------------
mpath = "/usr/lib/x86_64-linux-gnu/opensips/modules"


loadmodule "maxfwd.so"
loadmodule "signaling.so"
loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "db_mysql.so"
loadmodule "dispatcher.so"


loadmodule "proto_udp.so"


# ----------------- setting module-specific parameters ---------------
modparam("dispatcher", "db_url", "mysql://opensips:opensipsrw@localhost/opensips")


route {
  if (!mf_process_maxfwd_header(10)) {
    send_reply(483, "Too Many Hops");
    exit;
  }


  if (!ds_select_dst(2, 0)) {
    send_reply(503, "Service Unavailable");
    exit;
  }


  t_relay();
}
```

--------------------------------

### General ACC Module Configuration

Source: https://docs.opensips.org/manual/3-6/modules/acc

Example demonstrating how to load the ACC module and trigger accounting for specific calls using the do_accounting function.

```opensips

loadmodule "modules/acc/acc.so"


if ($ru=~"sip:+40") /* calls to Romania */ {
    if (!proxy_authorize("sip_domain.net" /* realm */,
    "subscriber" /* table name */))  {
        proxy_challenge("sip_domain.net" /* realm */, "0" /* no qop */ );
        exit;
    }


    if (is_method("INVITE") && $au!=$fU) {
        xlog("FROM URI != digest username\n");
        sl_send_reply(403,"Forbidden");
    }


    do_accounting("log"); /* set for accounting via syslog */
    t_relay(); /* enter stateful mode now */
};

```

--------------------------------

### lb_start(grp, resources[, flags][, attrs])

Source: https://docs.opensips.org/manual/3-6/modules/load_balancer

Starts a new load-balancing session to find the least loaded destination that matches the requested resources and group.

```APIDOC
## lb_start(grp, resources[, flags][, attrs])

### Description
Starts a new load-balancing session over available destinations. It identifies the least loaded destination capable of providing the requested resources within the specified group.

### Parameters
- **grp** (int) - Required - Group ID for the destinations.
- **resources** (string) - Required - Semi-colon separated list of required resources.
- **flags** (string) - Optional - Control flags: 'n' (negative availability), 'r' (relative value), 's' (random selection).
- **attrs** (var) - Optional - Writable variable to store attributes of the selected destination.

### Returns
- **1 (true)** - Destination URI set.
- **-1 (false)** - Internal error.
- **-2 (false)** - No capacity available.
- **-3 (false)** - No destinations available.
- **-4 (false)** - Bad resources.
```

--------------------------------

### XML-RPC request and response example

Source: https://docs.opensips.org/manual/3-6/modules/mi_xmlrpc_ng

Example of an XML-RPC request for statistics and the corresponding response.

```XML

POST /xmlrpc HTTP/1.0
Host: my.host.com
User-Agent: My xmlrpc UA
Content-Type: text/xml
Content-Length: 216


<?xml version='1.0'?>
<methodCall>
  <methodName>get_statistics</methodName>
  <params>
    <param>
    <value>
    <struct>
    <member>
      <name>statistics</name>
      <value>
      <array>
      <data>
        <value><string>shmem:</string></value>
        <value><string>core:</string></value>
      </data>
      </array>
      </value>
    </member>
    </struct>
    </value>
    </param>
  </params>
</methodCall>




HTTP/1.0 200 OK
Content-Length: 236
Content-Type: text/xml; charset=utf-8
Date: Mon, 8 Mar 2013 12:00:00 GMT


<?xml version="1.0" encoding="UTF-8"?>.
<methodResponse>
<params><param>
<value><struct><member><name>net:waiting_udp</name><value><string>0</string></value></member><member><name>net:waiting_tcp</name><value><string>0</string></value></member><member><name>net:waiting_tls</name><value><string>0</string></value></member><member><name>shmem:total_size</name><value><string>268435456</string></value></member><member><name>shmem:used_size</name><value><string>40032</string></value></member><member><name>shmem:real_used_size</name><value><string>277112</string></value></member><member><name>shmem:max_used_size</name><value><string>277112</string></value></member><member><name>shmem:free_size</name><value><string>268158344</string></value></member><member><name>shmem:fragments</name><value><string>194</string></value></member></struct></value></param></params>
</methodResponse>.
```

--------------------------------

### AVP Substitution Examples

Source: https://docs.opensips.org/manual/3-6/modules/avpops

Examples of applying Perl/sed-like substitutions to AVP string values.

```opensips
# if avp 678 has a string value in e-mail format, replace the
# domain part with the value of domain part from R-URI
avp_subst("$avp(678)", "/(.*)@(.*)/\1@$rd/");


# if any avp 678 has a string value in e-mail format, replace the
# domain part with the value of domain part from R-URI
# and place the result in avp 679
avp_subst("$avp(678)/$avp(679)/g", "/(.*)@(.*)/\1@$rd/");
...
```

--------------------------------

### Install Compilation Dependencies

Source: https://docs.opensips.org/manual/3-6/modules/cachedb_mongodb

Commands to install the development packages required to compile the CACHEDB_MONGODB module.

```bash
# Debian / Ubuntu
sudo apt-get install libjson-c-dev libmongoc-dev libbson-dev


# Red Hat / CentOS
sudo yum install json-c-devel mongo-c-driver-devel
```

--------------------------------

### Clone the SIPssert tests repository

Source: https://docs.opensips.org/manual/3-6/conformance-tests

Initial command to fetch the testing framework repository.

```bash
git clone git@github.com:OpenSIPS/sipssert-opensips-tests.git
```

--------------------------------

### H.350 callPreferenceURI rule examples

Source: https://docs.opensips.org/manual/3-6/modules/h350

Examples of callPreferenceURI attribute formats for different forwarding scenarios.

```text
# Example 1:
# forward to sip:voicemail@example.com on no answer after 15 seconds:


callPreferenceURI: sip:voicemail@example.com n:15000


# Example 2:
# unconditionally forward to sip:alice@example.com:


callPreferenceURI: sip:alice@example.com u


# Example 3:
# forward to sip:bob@example.com and sip:alice@example.com
# (forking) on destination not found:


callPreferenceURI: sip:bob@example.com f
callPreferenceURI: sip:alice@example.com f
```

--------------------------------

### Initialize Berkeley DB Tables

Source: https://docs.opensips.org/manual/3-6/modules/db_berkeley

Commands to create the required and optional database table groups using the opensipsdbctl utility.

```bash
opensipsdbctl create       (required)
opensipsdbctl presence     (optional)
opensipsdbctl extra        (optional)
```

--------------------------------

### AVP Check Examples

Source: https://docs.opensips.org/manual/3-6/modules/avpops

Examples of using avp_check to compare AVP values against operators and other variables.

```opensips
...
avp_check("$avp(678)", "lt/345/g");
avp_check("$fd", "eq/$td/I");
avp_check("$avp(foo)", "gt/$avp($bar)/g");
avp_check("$avp(foo)", "re/sip:.*@bar.net/g");
avp_check("$avp(foo)", "fm/$avp(fm_avp)/g");
...
```

--------------------------------

### AVP Naming Examples

Source: https://docs.opensips.org/manual/3-6/modules/avpops

Examples of how to identify AVPs using numeric or string identifiers.

```OpenSIPS Script
$avp(11) - the AVP identified by name 11
$avp(foo) - the AVP identified by the string 'foo'
```

--------------------------------

### SST Call Flow Example

Source: https://docs.opensips.org/manual/3-6/modules/sst

A visual representation of the SIP Session Timer negotiation process, including MIN_SE validation and dialog creation.

```text

+-------+    +-------+       +-------+
| UAC-1 |    | PROXY |       | UAC-2 |
+-------+    +-------+       +-------+
    |(1) INVITE  |               |
    |SE: 50      |               |
    |----------->|               |
    |            |(2)sstCheckMin |
    |            |-----+         |
    |            |     |         |
    |            |<----+         |
    |(3) 422     |               |
    |MSE:1800    |               |
    |<-----------|               |
    |            |               |
    |(4)ACK      |               |
    |----------->|               |
    |            |               |
    |(5) INVITE  |               |
    |SE: 1800    |               |
    |MSE: 1800   |               |
    |----------->|               |
    |            |(6)sstCheckMin |
    |            |-----+         |
    |            |     |         |
    |            |<----+         |
    |            |(7)setflag     |
    |            |create dialog  |
    |            |Set expire     |
    |            |-----+         |
    |            |     |         |
    |            |<----+         |
    |            |               |
    |(8)INVITE   |
    |SE: 1800    |
    |MSE: 1800   |
    |-------------->|
    |               |
 ...

```

--------------------------------

### Route to Gateway Examples

Source: https://docs.opensips.org/manual/3-6/modules/drouting

Examples of using route_to_gw to route calls to specific gateways or lists of gateways.

```opensips
# use_partitions is not set
if ( route_to_gw("gw_europe") ) {
  t_relay();
  exit;
}
```

```opensips
# use_partitions is not set
if ( route_to_gw("gw1,gw2,gw3", $var(gw_attrs)) ) {
  xlog("Relaying to first gateway from our list - $var(gw_attrs)\n");
  t_relay();
  exit;
}
```

```opensips
# use_partitions is enabled
if ( route_to_gw("gw_europe", , , "my_partition") ) {
  t_relay();
  exit;
}
```

```opensips
# use_partitions is enabled
if ( route_to_gw("gw1,gw2,gw3", $var(gw_attrs), , "my_partition") ) {
  xlog("Relaying to first gateway from our list - $var(gw_attrs)\n");
  t_relay();
  exit;
}
```

--------------------------------

### Using the Benchmark API in OpenSIPS Modules

Source: https://docs.opensips.org/manual/3-6/modules/benchmark

Demonstrates loading the benchmark API and using it to register and track execution time for specific operations.

```c

#include "../benchmark/benchmark.h"
...
struct bm_binds bmb;
...
...
/* load the benchmarking API */
if (load_bm_api( &bmb )!=0) {
    LM_ERR("can't load benchmark API\n");
    goto error;
}
...
...
/* Start/log timers during a (usually user-exported) module function */
bmb.bm_register("test", 1, &id)
bmb.bm_start(id);
do_something();
bmb.bm_log(id);
...
```

--------------------------------

### XMLRPC Request Example

Source: https://docs.opensips.org/manual/3-6/modules/event_xmlrpc

An example of the raw HTTP POST request sent by the module to an XMLRPC server.

```HTTP

POST /RPC2 HTTP/1.1.
Host: 127.0.0.1:8081.
Connection: close.
User-Agent: OpenSIPS XMLRPC Notifier.
Content-type: text/xml.
Content-length: 240.
    .
<?xml version="1.0"?>
<methodCall>
  <methodName>e_dummy_h</methodName>
  <params>
    <param>
      <value><string>E_MY_EVENT</string></value>
    </param>
    <param>
      <name>ip</name>
      <value><string>192.168.2.11</string></value>
    </param>
  </params>
</methodCall>

```

--------------------------------

### Subscribe to Events via Configuration

Source: https://docs.opensips.org/manual/3-6/modules/event_sqs

Register an event subscription in the startup_route.

```opensips
subscribe_event("MY_EVENT",
  "sqs:http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/Queue2");
```

--------------------------------

### Carrierfailureroute Table Example

Source: https://docs.opensips.org/manual/3-6/modules/carrierroute

Example of a failure route table configuration for handling gateway failover scenarios.

```SQL
+----+---------+--------+---------------+------------+-------------+
| id | carrier | domain | host_name     | reply_code | next_domain |
+----+---------+--------+---------------+------------+-------------+
|  1 |       1 | 0      | gw.carrier1-2 | ...        | 3           |
|  2 |       1 | 0      | gw.carrier1-3 | ...        | 2           |
+----+---------+--------+---------------+------------+-------------+
```

--------------------------------

### init_uac(accept_types, from_uri, to_uri, ruri, hdl)

Source: https://docs.opensips.org/manual/3-6/modules/msrp_ua

Initializes an MSRP UA session by sending a SIP INVITE to a destination.

```APIDOC
## init_uac(accept_types, from_uri, to_uri, ruri, hdl)

### Description
Initializes a MSRP UA session by sending a SIP INVITE to a destination.

### Parameters
- **accept_types** (str) - The value of the “accept-types” attribute to include in the SDP offer.
- **from_uri** (str) - URI to use in the From header of the INVITE.
- **to_uri** (str) - URI to use in the To header of the INVITE.
- **ruri** (str) - Request URI to use in the for the INVITE.
- **hdl** (struct msrp_ua_handler) - Handler structure used to register the callbacks for SIP level and MSRP level notifications.
```

--------------------------------

### OpenSIPS Config Script with DB_TEXT

Source: https://docs.opensips.org/manual/3-6/modules/db_text

A complete configuration example showing module loading, parameter settings for dbtext, and request routing logic.

```opensips
#
# simple quick-start config script with dbtext
#


# ----------- global configuration parameters ------------------------


#debug_mode=yes
udp_workers=4


check_via=no    # (cmd. line: -v)
dns=no          # (cmd. line: -r)
rev_dns=no      # (cmd. line: -R)


socket=udp:10.100.100.1:5060


# ------------------ module loading ----------------------------------


# use dbtext database
loadmodule "modules/dbtext/dbtext.so"


loadmodule "modules/sl/sl.so"
loadmodule "modules/tm/tm.so"
loadmodule "modules/rr/rr.so"
loadmodule "modules/maxfwd/maxfwd.so"
loadmodule "modules/usrloc/usrloc.so"
loadmodule "modules/registrar/registrar.so"
loadmodule "modules/textops/textops.so"
loadmodule "modules/textops/mi_fifo.so"


# modules for digest authentication
loadmodule "modules/auth/auth.so"
loadmodule "modules/auth_db/auth_db.so"


# ----------------- setting module-specific parameters ---------------


# -- mi_fifo params --


modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")


# -- usrloc params --


# use dbtext database for persistent storage
modparam("usrloc", "db_mode", 2)
modparam("usrloc|auth_db", "db_url", "text:///tmp/opensipsdb")


# -- auth params --
#
modparam("auth_db", "calculate_ha1", 1)
modparam("auth_db", "password_column", "password")
modparam("auth_db", "user_column", "username")
modparam("auth_db", "domain_column", "domain")


# -------------------------  request routing logic -------------------


# main routing logic


route{
    # initial sanity checks -- messages with
    # max_forwards==0, or excessively long requests
    if (!mf_process_maxfwd_header("10")) {
        sl_send_reply(483,"Too Many Hops");
        exit;
    };
    if ($ml >=  65535 ) {
        sl_send_reply(513, "Message too big");
        exit;
    };


    # we record-route all messages -- to make sure that
    # subsequent messages will go through our proxy; that's
    # particularly good if upstream and downstream entities
    # use different transport protocol
    if (!$rm=="REGISTER") record_route();


    # subsequent messages withing a dialog should take the
    # path determined by record-routing
    if (loose_route()) {
        # mark routing logic in request
        append_hf("P-hint: rr-enforced\r\n");
        route(1);
        exit;
    };


    if (!is_myself("$rd")) {
        # mark routing logic in request
        append_hf("P-hint: outbound\r\n");
        route(1);
        exit;
    };


    # if the request is for other domain use UsrLoc
    # (in case, it does not work, use the following command
    # with proper names and addresses in it)
    if (is_myself("$rd")) {
        if ($rm=="REGISTER") {
            # digest authentication
            if (!www_authorize("", "subscriber")) {
                www_challenge("", "0");
                exit;
            };


            save("location");
            exit;
        };


        lookup("aliases");
        if (!is_myself("$rd")) {
            append_hf("P-hint: outbound alias\r\n");
            route(1);
            exit;
        };


        # native SIP destinations are handled using our USRLOC DB
        if (!lookup("location")) {
            sl_send_reply(404, "Not Found");
            exit;
        };
    };
    append_hf("P-hint: usrloc applied\r\n");
    route(1);
}


route[1]
{
    # send it out now; use stateful forwarding as it works reliably
    # even for UDP2TCP
    if (!t_relay()) {
        sl_reply_error();
    };
}
```

--------------------------------

### JSON-RPC Event Payload Example

Source: https://docs.opensips.org/manual/3-6/modules/event_datagram

Example of an event payload formatted as a JSON-RPC notification, as generated by the pike module.

```json
{
  "jsonrpc": "2.0",
  "method": "E_PIKE_BLOCKED",
  "params": {
    "ip": "192.168.2.11"
  }
}
```

--------------------------------

### Implement custom route_offer logic

Source: https://docs.opensips.org/manual/3-6/modules/rtp_relay

Example implementation of the route triggered during SDP offer processing.

```OpenSIPS Script
... 
route[rtp_relay_offer] { 
  # manually engaging RTPEngine, get the SDP, and replace it in the message 
  return (1, $var(body)); 
} 
...
```

--------------------------------

### Perform Asynchronous HTTP GET

Source: https://docs.opensips.org/manual/3-6/modules/rest_client

Executes a non-blocking GET request and handles the response in a resume route.

```OpenSIPS Script

route {
  ...
  async(rest_get("http://getcredit.org/?account=$fU",
                 $var(credit), , $var(rcode)), resume);
}


route [resume] {
  $var(rc) = $rc;
  if ($var(rc) < 0) {
    xlog("async rest_get() failed with $var(rc), acc=$fU\n");
    send_reply(500, "Server Internal Error");
    exit;
  }


  if ($var(rcode) != 200) {
    xlog("L_INFO", "async rest_get() rcode=$var(rcode), acc=$fU\n");
    send_reply(403, "Forbidden");
    exit;
  }


  ...
}

```

--------------------------------

### Install Required Packages

Source: https://docs.opensips.org/manual/3-6/modules/cachedb_mongodb

Commands to install the necessary runtime dependencies for the CACHEDB_MONGODB module on Debian/Ubuntu and Red Hat/CentOS systems.

```bash
# Debian / Ubuntu
sudo apt-get install libjson-c2 libmongoc-1.0


# Red Hat / CentOS
sudo yum install json-c mongo-c-driver
```

--------------------------------

### Initialize Git Submodules

Source: https://docs.opensips.org/manual/3-6/modules/tls_wolfssl

Use this command to fetch the wolfSSL library code if the repository was cloned without the --recursive option.

```bash
git submodule update --init
```

--------------------------------

### Carrier Mapping Table Example

Source: https://docs.opensips.org/manual/3-6/modules/carrierroute

Example of the carrier mapping table structure used to associate IDs with carrier names.

```text
+----+----------+
| id | carrier  |
+----+----------+
|  1 | carrier1 |
|  2 | carrier2 |
|  3 | default  |
+----+----------+
```

--------------------------------

### Call example_int() function

Source: https://docs.opensips.org/manual/3-6/modules/example

Logs a provided integer or the default_int parameter if no argument is passed.

```OpenSIPS Script

...
example_int(10);
...
```

--------------------------------

### Infrastructure ENUM EBL record example

Source: https://docs.opensips.org/manual/3-6/modules/enum

Example DNS records for the 'ebl' branching algorithm using record type 65300.

```dns
i.1.e164.arpa.     TYPE65300  \# 14 (
                              04    ; position
                              01 69 ; separator
                              04 65 31 36 34 04 61 72 70 61 00 ; e164.arpa
;                               )
9.9.9.8.7.6.5.i.4.3.2.1.e164.arpa. IN NAPTR "NAPTR content for  +1 234 5678 999"
```

--------------------------------

### Check or start OpenSIPS with a rendered configuration

Source: https://docs.opensips.org/manual/3-6/generating-configs

Once rendered, the configuration file can be used directly with standard OpenSIPS commands.

```bash
opensips -C -f opensips.cfg
opensips -f opensips.cfg
```

--------------------------------

### List available commands with which

Source: https://docs.opensips.org/manual/3-6/interface-coremi

Returns an array of all available MI commands, which may vary based on loaded modules.

```bash
$ opensips-cli -x mi which
[
    "get_statistics",
    "list_statistics",
    "reset_statistics",
    "uptime",
    "version",
    "pwd",
    "arg",
    "which",
    "ps",
    "kill",
    "log_level",
    "xlog_level",
    "shm_check",
    "cache_store",
    "cache_fetch",
    "cache_remove",
    "event_subscribe",
    "events_list",
    ...
```

--------------------------------

### Configure FreeSWITCH Subscriptions

Source: https://docs.opensips.org/manual/3-6/modules/freeswitch_scripting

Adds FreeSWITCH ESL URLs for connection at startup, supporting event subscription lists.

```opensips
modparam("freeswitch_scripting", "fs_subscribe", ":ClueCon@10.0.0.10?CHANNEL_STATE")
modparam("freeswitch_scripting", "fs_subscribe", ":ClueCon@10.0.0.11:8021?DTMF,BACKGROUND_JOB")
```

--------------------------------

### Accessing Contact Instance Fields

Source: https://docs.opensips.org/manual/3-6/script-corevar

Examples demonstrating how to retrieve specific fields from contact instances using index notation.

```OpenSIPS Script
$ct.fields(uri)
```

```OpenSIPS Script
$(ct.fields(name)[1])
```

--------------------------------

### Apply patch and install freeRADIUS client

Source: https://docs.opensips.org/manual/3-6/modules/aaa_radius

Commands to apply the OpenSIPS async patch to the library source and proceed with the standard installation process.

```bash
........
cd freeRADIUS-client/freeradius-client-1.1.7.tar.gz
patch -p1 < /path/to/opensips/modules/aaa_radius/radius_async_support.patch
./configure --any-options-you-want
make
sudo make install
........
```

--------------------------------

### Configure H350 Module Parameters

Source: https://docs.opensips.org/manual/3-6/modules/h350

Configuration examples for the H350 module parameters including LDAP session, base DN, and search scope.

```c
modparam("h350", "ldap_session", "h350");
```

```c
modparam("h350", "base_dn", "ou=h350,dc=example,dc=com");
```

```c
modparam("h350", "search_scope", "sub");
```

--------------------------------

### LDAP Search URL Examples

Source: https://docs.opensips.org/manual/3-6/modules/ldap

Examples of LDAP URLs used to define search operations, including base DN, scope, and filters.

```text
ldap://sipaccounts/ou=sip,dc=example,dc=com??one?(cn=schlatter)
```

```text
ldap://ldap_1/dc=example,dc=com?
       SIPIdentityUserName,SIPIdentityServiceLevel?sub?(cn=$(avp(name)))
```